Technical co-founders are necessarily naïve.
Why?
Because once they've been one once, they don't want to be one again. The only "serial" technical co-founders I've encountered have usually failed to get to the MVP stage of any of the companies they've founded, and thus don't know the hell their path leads to.
I speak from first-hand experience. I would sooner chew my own legs off than do this again. Not because I dislike my company, or don't like what I do today, but because it's traumatic, and I've no desire to go through it again.
It costs you years of your life, you don't get sleep, or friends, and at the end of it all, nobody will thank you, they'll just resent you, as those that were there from the start never realised just how much the technical co-founder did to make things work in the early days (not so fond memories of not leaving my desk for 9 grim, sticky days), and those that started later don't see the technical co-founder getting as involved in the technology as much, and thus view them as disconnected.
Damned either way.
If you get someone in with experience, they'll tell you to get bent, won't do the death-marches that you often need to get the ball rolling, and will want to be paid their worth, rather than nothing.
So yeah - your only hope is to get to know technical folks while they're still learning, and get them in then - otherwise they'll know better and will refuse your poisoned chalice.